JPH043430Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a connection device for FPC boards, and in particular, to circuit boards that are housed and arranged in the cases of electrical equipment, automobiles, motorcycles, etc., indicating instruments. The present invention relates to an FPC board connection device that electrically connects an FPC board and an FPC board disposed on the outer surface of a case.

(Prior Art) Generally, FPC boards are widely used as wiring members for electrical equipment and instruments for vehicles such as automobiles and motorcycles. Various electrical connection devices have been proposed.

For example, as shown in FIGS. 6A and 6B, a conductive terminal part 3 is crimped to a circuit board 2 housed in a case 1 to electrically connect it to the circuit board 2, and an FPC board is attached to the outside of the case 1. (Flexible printed wiring board)
4, and tighten the conductive screws 7 from the outside of the case 1 to the conductive terminals 3 through the connection parts 6 of the conductive patterns 5 formed on the outer surface of the FPC board 4, and then tighten the circuit board. A configuration in which the FPC board 2 and the FPC board 4 are electrically connected is known.

However, in this case, there is a problem that when electrically connecting the circuit board 2 and the FPC board 4, the screws 7 must be screwed and tightened to the conductive terminal portion 3, which increases the number of work steps.

Further, if there is a positional misalignment between the case 1 and the circuit board 2 when they are assembled, there is another problem in that it becomes difficult to tighten the screws 7 to the conductive terminal portions 3.

In consideration of such problems, as a connecting device configured without using screws 7, a connector 8 is provided on the circuit board 2 as shown in FIGS. At the same time, a plug-in piece 9 is formed on the case 1 to protrude inward of the case in correspondence with the connector 8, and the FPC board 4 is folded back along the plug-in piece 9, and the plug-in piece 9 is folded back. By inserting into the connector 8, the connecting portion 6 of the conductive pattern 5 and the conductive terminal portion 3 are connected.
There has also been proposed a configuration in which the circuit board 2 and the FPC board 4 are electrically connected by bringing them into contact with each other.

(Problem to be solved by the invention) According to the configuration of the conventional example, the circuit board 2 and
Although the FPC board 4 can be electrically connected to the FPC board 4 without using the screws 7, and the number of work hours required for connection can be reduced, it is necessary to hold the FPC board 4 along the insertion piece 9. because it has to be
It takes time and effort to move the FPC board 4, which tends to reduce the efficiency of the assembly process.In addition, since the insertion piece 9 is integrally formed to protrude from the case 1, the connector 8 or the case 1 When inserting the plug-in piece 9 together with the FPC board 4 due to misalignment of the mounting position, the connection part 6 of the conductive pattern 5 may come into contact with the conductive terminal part 3 with excessive pressing force, damaging the connection part 6 or causing contact. The pressure is weak, and there is a possibility that poor conductivity will occur between the circuit board 2 and the FPC board 4.

By the way, there is a connection device for arranging an FPC board with a conductive pattern formed on the surface that contacts the case on the outside of the case, such as in Japanese Utility Model Application No. 61-48586. lamps must be attached from the outside of the case, and therefore, in order to electrically connect these lamps to the FPC board, it is necessary to form a conductive pattern on the outside of the FPC board. The connection device disclosed in the above-mentioned publication cannot be applied. Further, Japanese Utility Model Application Publication No. 58-188989 discloses a connecting device configured to electrically connect a conductive terminal part in a connector and an FPC board by inserting a connecting body into the connector. , this is after inserting the FPC board connection directly inside the connector,
In order to electrically connect the conductive terminal part and the connection part by inserting the connection body and pressing the conductive terminal part against the connection part with the inclined surface formed on the connection body,
It is necessary to insert the connecting part of the FPC board into the connector in advance, which has a disadvantage in assembly workability.
If the board is leaning toward the side where the board is inserted, the FPC
Not only does the task of inserting the board become more difficult, but
There is a risk of causing poor contact due to damage to the FPC board.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an FPC board connection device that solves the above-mentioned problems, improves the efficiency of connection work, and can reliably electrically connect a circuit board and an FPC.

[Structure of the invention] (Means for solving the problem) The present invention provides an elastically deformable conductive terminal portion in a connector provided on a circuit board, and a case for an insert body to be inserted into the connector. placed on the outside
Each of the conductive terminal parts is pressed through the connection part of the FPC board, the conductive terminal part is bent in a direction away from the connection part, and the connection part is inserted and guided between the conductive terminal part and the wall surface inside the connector. A guide portion having an inclined portion and bending and guiding the connecting portion guided by the inclined portion along the wall surface inside the connector is provided between each of the conductive terminal portions, and a guide portion is provided between the conductive terminal portions. A pressing portion is provided for electrically connecting the conductive terminal portion and the connecting portion by pressing the portion toward the connecting portion.

(Function) By inserting the insert into the connector
The connection part of the FPC board is also guided into the connector at the same time.
A conductive terminal part is provided on the circuit board so that it can be elastically deformed, and this conductive terminal part is pressed against the connection part of the FPC board by the pressing part of the inserter to electrically connect the circuit board and the FPC board, thereby changing the mounting position of the connector. Even if the FPC board is misaligned, it can absorb errors in the mounting position and ensure the electrical connection between the circuit board and the FPC board.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.

1 to 3 show a first embodiment of the present invention applied to a vehicle instrument, in which a case 11 houses a well-known movable coil type instrument body 12 such as an engine tachometer, and this instrument. A circuit board 13 constituting a drive circuit for the main body 12 is housed and arranged.

The connector 14 provided on the circuit board 13 opens toward the wall surface 11A of the case 11, and a pair of locking claws 15 are resiliently provided on the circuit board 13 side. circuit board 1
The connector 14 is attached to the circuit board 13 by inserting it through a through hole 16 provided in the connector 3 and locking the locking claw 15 to the circuit board 13.

Further, a plurality of conductive terminal portions 17 made of brass, iron, etc. are disposed within the connector 14, and the lower ends thereof penetrate the bottom wall of the connector 14 and are electrically connected to the circuit board 13 by soldering or the like. The conductive terminal portion 17 is provided so as to be elastically deformable in a state connected to the circuit board 13, and furthermore, the distal end side of the conductive terminal portion 17 is formed by folding back into a curved shape.

Further, an insertion hole 18 is formed in the wall surface 11A of the case 11 in correspondence with the connector 14, and the instrument body 18 is formed in the outer surface of the wall surface 11A.
A flexible FPC board 19 is disposed to route and form an electric line from the circuit board 13 or the circuit board 13 to the outside.
A conductive pattern 20 formed by printing copper foil or the like is provided on the outer surface of the FPC board 19 that is not in contact with the case 11.

In this case, the conductive pattern 20 has a connecting portion 21 which is routed and disposed inside the connector 14 in order to connect to the conductive terminal portion 17, and the outer surface of the conductive pattern 20 is insulated except for the connecting portion 21. covered with a membrane.

In addition, an insert body 2 in which the connecting portion 21 of the conductive pattern 20 is routed and arranged inside the connector 14.
2 is made of an insulating synthetic resin material, and on both ends of one side thereof, the connecting portion 21 of the FPC board 19 is guided between them and guided to a proper position within the connector 14, and the connector A pair of guide pieces 23 for stably inserting the insert body 22 into the connector by inserting it along the grooves 14A of the 14 are respectively protruded and positioned between the conductive terminal parts 17. Connect the connecting portion 21 of the FPC board 19 to the wall surface 1 inside the connector 14.
Guide portions 24 for guiding to the vertical portion 24A are formed to protrude substantially parallel to each other, and the guide portions 24 are guided to the vertical portion 24A.
and an inclined portion 24B, the tip of which is formed into a curved shape. Furthermore, a pressing part 25 for pressing the conductive terminal part 17 against the connecting part 21 is formed in the insert body 22, and this pressing part 25 is also provided with a vertical part 25A and an inclined part 25B. The portions 24B are inclined in a direction approaching each other from the distal end to the proximal end, and the vertical portions 25
A protrusion 26 is formed at the cylindrical location where A and the inclined portion 25B intersect.

The configuration of this embodiment has been described above, and now the connection work will be described. First, FPC board 1
9 is arranged above the opening of the connector 14 (see FIG. 3A), and the two sides of the connection part 21 of the FPC board 19 are inserted between the guide pieces 23 of the insert body 22 and guided into this state. Then, the guide piece 23 is fitted into the groove 14A of the connector 14, and the insert body 22 is inserted into the connector 14 through the insertion hole 18, and the lower end of the guide part 24 of the insert body 22
The FPC board 19 is pushed into the connector 14, and at this time, while the conductive terminal part 17 and the inner surface of the FPC board 19 are in contact with each other, the conductive terminal part 17 is inserted into the guide part 24 through the FPC board 19. When the insert body 22 is further pushed in, the connecting part 21 is guided by the vertical part 24A of the guide part 24 and the connector 1
When the connecting portion 21 and the conductive terminal portion 17 are separated from each other, the conductive terminal portion 17 is elastically returned to its original position (see FIG. 3C). In this embodiment, the conductive terminal part 17 is bent by the inclined part 24B of the guide part 24, but when the hardness of the FPC board 19 itself is relatively large, the conductive terminal part 1 is bent only by the elastic force of the connecting part 21.
This will cause 7 to collapse.

When the insert 22 is further pushed in this state, the conductive terminal portion 17 is pushed along the inclined portion 25B of the pressing portion 25 provided on the insert 22, and
The FPC board 19 falls down toward the connection part 21 side, and the conductive terminal part 17 and the connection part 21 come into contact (Fig. 3D
(See) After this, by further pushing the insert body 22, the upper end of the conductive terminal portion 17 engages with the protrusion 26 provided on the pressing portion 25, and the conductive terminal portion 1
7 and the connecting portion 21 of the FPC board 19, the conductive terminal portion 17 is held elastically, and the insert body 22
is regulated from coming out upwards (see Figure 3E).

Therefore, by inserting the insert body 22 into the connector 14, the connecting portion 21 of the FPC board 19 can be routed and electrically connected to the conductive terminal portion 17 at the same time, and the FPC board 19 and the circuit can be connected simultaneously. Board 13
Furthermore, even if the mounting positions of the case 11 and the circuit board 13 are misaligned, the conductive terminal portion 17 can be easily connected to the circuit board 1.
3 so that it can be elastically deformed, and the insert body 22 can also be detachably attached to the connector 14.
This prevents the conductive terminal portion 17 from coming into contact with the connection portion 21 of the FPC board 19 with excessive pressing force, or from causing poor conductivity due to weak contact pressure.

Furthermore, in the embodiment described above, the end portion of the FPC board 19 is routed and arranged inside the connector 14, and the insert body 2
2 is engaged with the conductive terminal portion 17 to prevent the insert 22 from coming off, but as shown in FIG. 21, and locking claws 28 are resiliently provided at both ends of the insert body 22 in correspondence with the engagement holes 27 in which the connectors 14 are provided.
2 into the connector 14, the tongue-shaped connecting portion 21 is drawn and disposed along the inner wall surface 14B of the connector 14, and the connecting portion 21 and the conductive terminal portion 17 are electrically connected, The insert body 22 may be configured such that its locking claw 28 is locked in the engagement hole 27 of the connector 14 to prevent it from coming off upwardly. , and the electrical connection to the conductive terminal portion 17 can be made at the same time, and substantially the same operation and effect as in the embodiment described above can be obtained.

Further, as shown in FIG. 5, a part of the inner wall of the connector 30 is constituted by a circuit board 13.
3 is the wall surface inside the connector 30, and the insert body 22 is inserted into the connector 30 to connect the connecting portion 2 of the FPC board 19.
1 may be pressed against the circuit board 13.

Although various embodiments have been described in detail above, modifications can be made as appropriate within the scope of the gist of the present invention.
For example, although the connector is attached to the circuit board by being locked with the locking claw, it may be attached to the circuit board with screws or rivets, and the number of conductive terminal portions may be set as appropriate.

[Effects of the invention] As detailed above, the present invention presses each conductive terminal part through the connection part of the FPC board arranged on the outer surface of the case to the insert inserted into the connector provided on the circuit board. It has an inclined part that bends the electrically conductive terminal part in a direction away from the connecting part and guides insertion of the connecting part between the electrically conductive terminal part and the wall surface inside the connector, and the electrically conductive terminal part is guided by the inclined part. A guide portion is provided between each of the conductive terminal portions for bending and guiding the connecting portion along a wall surface within the connector;
A pressing part is provided that presses the conductive terminal part against the connection part side to electrically connect the conductive terminal part and the connection part, and by inserting the connector of the insert body, the connection part of the FPC board can be routed. Because the installation and electrical connection to the conductive terminal can be done at the same time, the connection work can be made easier.In addition, by providing the conductive terminal on the circuit board so that it can be elastically deformed, the case Even if there is a misalignment in the mounting position between the circuit board and the circuit board, the error in the mounting position can be absorbed, so the conductive terminal part and the connection part of the FPC board can be connected with appropriate contact pressure, and the circuit board and FPC board can be connected with appropriate contact pressure. It is possible to provide an FPC board connection device that can provide good electrical connection between the FPC board and the FPC board.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention,
Fig. 1 is an overall sectional view, Fig. 2 is an exploded perspective view of the main parts, Fig. 3 A, B, C, D, and E are all sectional views of the main parts showing the inserted state of the insert, and Fig. 4 5 is an exploded perspective view of the main parts showing another embodiment of the present invention, FIG. 5 is a sectional view of the main parts showing still another embodiment, FIGS. Figure A is a sectional view of the main part, Figure 6B is a perspective view, Figures 7A and B show other conventional examples, Figure 7A is a sectional view of the main part, and Figure 7B is a perspective view of the same. It is. 1, 11... Case, 2, 13... Circuit board,
3, 17... Conductive terminal part, 4, 19... FPC board,
5, 20... Conductive pattern, 6, 21... Connection portion, 8, 14, 30... Connector, 14B... Wall surface, 18... Insertion hole, 24... Guide portion, 24B
... Inclined part, 25 ... Pressing part.

Claims (1)

[Scope of utility model registration request] A circuit board housed and disposed in a case, a connector provided on the circuit board, a plurality of elastically deformable conductive terminal portions disposed within the connector and electrically connected to the circuit board, and the connector. an insertion hole drilled in the wall of the case corresponding to the
An FPC board disposed on the outer surface of the case and provided with a conductive pattern on at least the outer surface side, and a connecting portion of the FPC board that is inserted into the connector through the insertion hole and routed into the connector. an insert body, the conductive terminals are pressed against the insert body through the connection portions, and the conductive terminal portions are bent in a direction away from the connection portions, so that the connection portions are connected to the conductive terminals in the connector. Each of the conductive terminals has a guide portion that has an inclined portion that guides insertion between the conductive terminal portion and the wall surface, and that bends and guides the connecting portion guided by the inclined portion along the wall surface within the connector. An FPC characterized in that a pressing part is provided in between and presses the conductive terminal part against the connection part side to electrically connect the conductive terminal part and the connection part.
Board connection device.